Ábrahám Levente: Biomonitoring a Dráva folyó magyarországi szakasza mentén 2000-2004 - Natura Somogyiensis 7. (Kaposvár, 2005)

Dombi, Imre: Bat monitoring along the Drava River (Mammalia: Chiroptera) - Denevér-monitoring a Dráva mentén (Mammalia: Chiroptera)

152 NATURA SOMOGYIENSIS Noctule bat {Nyctalus noctulä) Common, generally wide-spread species. It lives in tree-holes, and can make up a 100individual-colony. It is not connected to special habitats, but in old forests and diverse areas it is present in a larger number. Building-dwelling colony is not known from the sampling areas neither from the surroundings. It feeds on mosquitoes to maybeetle, its nutrition-spectrum is very wide. It is indicated in great numbers in all sampling areas along the Drava, it is the most common species. It is indicated mostly with detectors. Leisler's bat (Nyctalus leisleri) Rare species. Nowadays it is in the mountains, but it was reported from the plains and floodplains, from Gemenc and Béda-Karapancsa (DOMBI 2003). Its roosting sites are exclusively in tree-holes. It is demanding concerning its habitat, it only occurs in old, natural, mixed forests. It has small 20-30 individual-colonies, it feeds on mosquitoes and moths. Its hunting areas are forests, forest edges and flooded areas. On the Drava only some individuals turned up in the Lankóci forest and the Mérus forest in Babócsa, which proved reproduction. Unfortunately, the species has not been captured in none of the areas since 2001, it has only one datum with detector from the Lankóci forest in 2004. Common pipistrelle {Pipistrellus pipistrellus) Generally common species in the whole country. It turns up mainly in urban areas. Due to its size it feeds on mosquitoes and plant-lice. It is present in all sampling areas along the Drava, but not in the same number as the soprano pipistrelle bat {Pipistrellus pygmeus) Soprano pipistrelle bat {Pipistrellus pygmeus) It was only recently separated from the common pipistrelle {Pipistrellus pipistrellus) based on genetic and acoustic researches. It is a forest-dwelling species, its roosting sites are tree-holes. Its national occurrence is not clarified yet, but it is most probably not rare. Its nutrition-base is similar to the related species. It is present in all sampling areas along the Drava. It is not common anywhere, but neither rare. Nathusius' pipistrelle bat {Pipistrellus nathusii) It prefers the plains. It is characteristic in floodplains and habitats close to water, it lives in holes. Its hunting areas are on flooded or near water habitats, where it feeds mostly on mosquitoes. In all sampling areas we only managed to indicate it with detector. One buildingdwelling colony is known from the perish in Berzence. Long-eared bat {Plecotus auritus) It is usually common in the midlands, but data from the hills and plains were also reported. By the latter we mean exclusively old, hardwood (oak-ash-elm gallery forests), or hardwood mixed forests It feeds mostly in the forests on moths. It was indicated in all four sampling areas along the Drava. Its presence indicates good, natural habitat. Grey long-eared bat {Plecotus austriacus) It is common and wide-spread in the whole country, mostly in human settlements and